Bun implements the following globals.

Global	Source	Notes
AbortController	Web
AbortSignal	Web
alert	Web	Intended for command-line tools
Blob	Web
Buffer	Node.js	See Node.js > Buffer
Bun	Bun	Subject to change as additional APIs are added
ByteLengthQueuingStrategy	Web
confirm	Web	Intended for command-line tools
__dirname	Node.js
__filename	Node.js
atob()	Web
btoa()	Web
BuildMessage	Bun
clearImmediate()	Web
clearInterval()	Web
clearTimeout()	Web
console	Web
CountQueuingStrategy	Web
Crypto	Web
crypto	Web
CryptoKey	Web
CustomEvent	Web
Event	Web	Also ErrorEvent CloseEvent MessageEvent.
EventTarget	Web
exports	Node.js
fetch	Web
FormData	Web
global	Node.js	See Node.js > global.
globalThis	Cross-platform	Aliases to global
Headers	Web
HTMLRewriter	Cloudflare
JSON	Web
MessageEvent	Web
module	Node.js
performance	Web
process	Node.js	See Node.js > process
prompt	Web	Intended for command-line tools
queueMicrotask()	Web
ReadableByteStreamController	Web
ReadableStream	Web
ReadableStreamDefaultController	Web
ReadableStreamDefaultReader	Web
reportError	Web
require()	Node.js
ResolveMessage	Bun
Response	Web
Request	Web
setImmediate()	Web
setInterval()	Web
setTimeout()	Web
ShadowRealm	Web	Stage 3 proposal
SubtleCrypto	Web
DOMException	Web
TextDecoder	Web
TextEncoder	Web
TransformStream	Web
TransformStreamDefaultController	Web
URL	Web
URLSearchParams	Web
WebAssembly	Web
WritableStream	Web
WritableStreamDefaultController	Web
WritableStreamDefaultWriter	Web